如何在 iOS 中共享 Instagram 上的图片？

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最佳答案

Finally I got the answer. you can not directly post an image on instagram. You have to rediredt your image with UIDocumentInteractionController.

@property (nonatomic, retain) UIDocumentInteractionController *dic;


CGRect rect = CGRectMake(0 ,0 , 0, 0);
UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, self.view.opaque, 0.0);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIGraphicsEndImageContext();
NSString  *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/test.igo"];


NSURL *igImageHookFile = [[NSURL alloc] initWithString:[[NSString alloc] initWithFormat:@"file://%@", jpgPath]];
self.dic.UTI = @"com.instagram.photo";
self.dic = [self setupControllerWithURL:igImageHookFile usingDelegate:self];
self.dic=[UIDocumentInteractionController interactionControllerWithURL:igImageHookFile];
[self.dic presentOpenInMenuFromRect: rect    inView: self.view animated: YES ];




- (UIDocumentInteractionController *) setupControllerWithURL: (NSURL*) fileURL usingDelegate: (id <UIDocumentInteractionControllerDelegate>) interactionDelegate {
UIDocumentInteractionController *interactionController = [UIDocumentInteractionController interactionControllerWithURL: fileURL];
interactionController.delegate = interactionDelegate;
return interactionController;
}

NOTE : once you redirect to instagram app you can not back to your app. you have to open your app again

Download source from here

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For iOS 6 and above, you can use this UIActivity to upload images to Instagram which has the same workflow using iOS hooks but simplifies development:

https://github.com/coryalder/DMActivityInstagram

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Here is the correct answer. you cannot directly post an image on Instagram. You need to redirect to Instagram using UIDocumentInteractionController...

NSString* imagePath = [NSString stringWithFormat:@"%@/instagramShare.igo", [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]];
[[NSFileManager defaultManager] removeItemAtPath:imagePath error:nil];
    

UIImage *instagramImage = [UIImage imageNamed:@"imagename you want to share"];
[UIImagePNGRepresentation(instagramImage) writeToFile:imagePath atomically:YES];
NSLog(@"Image Size >>> %@", NSStringFromCGSize(instagramImage.size));
    

self.dic=[UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:imagePath]];
self.dic.delegate = self;
self.dic.UTI = @"com.instagram.exclusivegram";
[self.dic presentOpenInMenuFromRect: self.view.frame inView:self.view animated:YES ];

NOTE : once you redirect to instagram app you can not back to your app. you have to open your app again

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- (void) shareImageWithInstagram
{
NSURL *instagramURL = [NSURL URLWithString:@"instagram://"];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL])
{
UICachedFileMgr* mgr = _gCachedManger;
UIImage* photoImage = [mgr imageWithUrl:_imageView.image];
NSData* imageData = UIImagePNGRepresentation(photoImage);
NSString* captionString = [NSString  stringWithFormat:@"ANY_TAG",];
NSString* imagePath = [UIUtils documentDirectoryWithSubpath:@"image.igo"];
[imageData writeToFile:imagePath atomically:NO];
NSURL* fileURL = [NSURL fileURLWithPath:[NSString stringWithFormat:@"file://%@",imagePath]];


self.docFile = [[self setupControllerWithURL:fileURL usingDelegate:self]retain];
self.docFile.annotation = [NSDictionary dictionaryWithObject: captionString
forKey:@"InstagramCaption"];
self.docFile.UTI = @"com.instagram.photo";


// OPEN THE HOOK
[self.docFile presentOpenInMenuFromRect:self.view.frame inView:self.view animated:YES];
}
else
{
[UIUtils messageAlert:@"Instagram not installed in this device!\nTo share image please install instagram." title:nil delegate:nil];
}
}

I tried this in my application and it will definitely work

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this is correct answer which i implement with detail. In .h file

 UIImageView *imageMain;
@property (nonatomic, strong) UIDocumentInteractionController *documentController;

in.m file only write

 NSURL *instagramURL = [NSURL URLWithString:@"instagram://app"];
if([[UIApplication sharedApplication] canOpenURL:instagramURL])
{
CGFloat cropVal = (imageMain.image.size.height > imageMain.image.size.width ? imageMain.image.size.width : imageMain.image.size.height);


cropVal *= [imageMain.image scale];


CGRect cropRect = (CGRect){.size.height = cropVal, .size.width = cropVal};
CGImageRef imageRef = CGImageCreateWithImageInRect([imageMain.image CGImage], cropRect);


NSData *imageData = UIImageJPEGRepresentation([UIImage imageWithCGImage:imageRef], 1.0);
CGImageRelease(imageRef);


NSString *writePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"instagram.igo"];
if (![imageData writeToFile:writePath atomically:YES]) {
// failure
NSLog(@"image save failed to path %@", writePath);
return;
} else {
// success.
}


// send it to instagram.
NSURL *fileURL = [NSURL fileURLWithPath:writePath];
self.documentController = [UIDocumentInteractionController interactionControllerWithURL:fileURL];
self.documentController.delegate = self;
[self.documentController setUTI:@"com.instagram.exclusivegram"];
[self.documentController setAnnotation:@{@"InstagramCaption" : @"We are making fun"}];
[self.documentController presentOpenInMenuFromRect:CGRectMake(0, 0, 320, 480) inView:self.view animated:YES];
}
else
{
NSLog (@"Instagram not found");


}

For sure you will get result. E.g you will see popover from bottom with instagram image.Click on it and have fun.

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As for me, the best and the easiest way described here Share photo to Instagram from my iOS App

You need to save image on device using .igo format, then use "UIDocumentInteractionController" to send local path Instagram app. Don't forget to set "UIDocumentInteractionControllerDelegate"

My advice is to add something like:

NSURL *instagramURL = [NSURL URLWithString:@"instagram://app"];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL])
{
<your code>
}

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Hope this answer will resolve your query. This will directly opens library folder in Instagram instead of Camera.

NSURL *instagramURL = [NSURL URLWithString:@"instagram://app"];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL])
{
NSURL *videoFilePath = [NSURL URLWithString:[NSString stringWithFormat:@"%@",[request downloadDestinationPath]]]; // Your local path to the video
NSString *caption = @"Some Preloaded Caption";
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeVideoAtPathToSavedPhotosAlbum:videoFilePath completionBlock:^(NSURL *assetURL, NSError *error) {
NSString *escapedString   = [self urlencodedString:videoFilePath.absoluteString];
NSString *escapedCaption  = [self urlencodedString:caption];
NSURL *instagramURL = [NSURL URLWithString:[NSString stringWithFormat:@"instagram://library?AssetPath=%@&InstagramCaption=%@",escapedString,escapedCaption]];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL]) {
[[UIApplication sharedApplication] openURL:instagramURL];
}
}];

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Here is a full tested code to Upload image + caption text to Instagram..

in.h file

//Instagram
@property (nonatomic, retain) UIDocumentInteractionController *documentController;


-(void)instaGramWallPost
{
NSURL *instagramURL = [NSURL URLWithString:@"instagram://app"];
if([[UIApplication sharedApplication] canOpenURL:instagramURL]) //check for App is install or not
{
NSData *imageData = UIImagePNGRepresentation(imge); //convert image into .png format.
NSFileManager *fileManager = [NSFileManager defaultManager];//create instance of NSFileManager
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); //create an array and store result of our search for the documents directory in it
NSString *documentsDirectory = [paths objectAtIndex:0]; //create NSString object, that holds our exact path to the documents directory
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"insta.igo"]]; //add our image to the path
[fileManager createFileAtPath:fullPath contents:imageData attributes:nil]; //finally save the path (image)
NSLog(@"image saved");


CGRect rect = CGRectMake(0 ,0 , 0, 0);
UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, self.view.opaque, 0.0);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIGraphicsEndImageContext();
NSString *fileNameToSave = [NSString stringWithFormat:@"Documents/insta.igo"];
NSString  *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:fileNameToSave];
NSLog(@"jpg path %@",jpgPath);
NSString *newJpgPath = [NSString stringWithFormat:@"file://%@",jpgPath];
NSLog(@"with File path %@",newJpgPath);
NSURL *igImageHookFile = [[NSURL alloc]initFileURLWithPath:newJpgPath];
NSLog(@"url Path %@",igImageHookFile);


self.documentController.UTI = @"com.instagram.exclusivegram";
self.documentController = [self setupControllerWithURL:igImageHookFile usingDelegate:self];
self.documentController=[UIDocumentInteractionController interactionControllerWithURL:igImageHookFile];
NSString *caption = @"#Your Text"; //settext as Default Caption
self.documentController.annotation=[NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"%@",caption],@"InstagramCaption", nil];
[self.documentController presentOpenInMenuFromRect:rect inView: self.view animated:YES];
}
else
{
NSLog (@"Instagram not found");
}
}


- (UIDocumentInteractionController *) setupControllerWithURL: (NSURL*) fileURL usingDelegate: (id <UIDocumentInteractionControllerDelegate>) interactionDelegate {
NSLog(@"file url %@",fileURL);
UIDocumentInteractionController *interactionController = [UIDocumentInteractionController interactionControllerWithURL: fileURL];
interactionController.delegate = interactionDelegate;


return interactionController;
}

OR

-(void)instaGramWallPost
{
NSURL *myURL = [NSURL URLWithString:@"Your image url"];
NSData * imageData = [[NSData alloc] initWithContentsOfURL:myURL];
UIImage *imgShare = [[UIImage alloc] initWithData:imageData];


NSURL *instagramURL = [NSURL URLWithString:@"instagram://app"];


if([[UIApplication sharedApplication] canOpenURL:instagramURL]) //check for App is install or not
{
UIImage *imageToUse = imgShare;
NSString *documentDirectory=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
NSString *saveImagePath=[documentDirectory stringByAppendingPathComponent:@"Image.igo"];
NSData *imageData=UIImagePNGRepresentation(imageToUse);
[imageData writeToFile:saveImagePath atomically:YES];
NSURL *imageURL=[NSURL fileURLWithPath:saveImagePath];
self.documentController=[[UIDocumentInteractionController alloc]init];
self.documentController = [UIDocumentInteractionController interactionControllerWithURL:imageURL];
self.documentController.delegate = self;
self.documentController.annotation = [NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"Testing"], @"InstagramCaption", nil];
self.documentController.UTI = @"com.instagram.exclusivegram";
UIViewController *vc = [UIApplication sharedApplication].keyWindow.rootViewController;
[self.documentController presentOpenInMenuFromRect:CGRectMake(1, 1, 1, 1) inView:vc.view animated:YES];
}
else {
DisplayAlertWithTitle(@"Instagram not found", @"")
}
}

and Write this to .plist

<key>LSApplicationQueriesSchemes</key>
<array>
<string>instagram</string>
</array>

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NSURL *instagramURL = [NSURL URLWithString:@"instagram://app"];


if ([[UIApplication sharedApplication] canOpenURL:instagramURL])
{


NSString  *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"Documents/Insta_Images/%@",@"shareImage.png"]];




NSURL *igImageHookFile = [[NSURL alloc] initWithString:[[NSString alloc] initWithFormat:@"file://%@", jpgPath]];




docController.UTI = @"com.instagram.photo";


docController = [self setupControllerWithURL:igImageHookFile usingDelegate:self];


docController =[UIDocumentInteractionController interactionControllerWithURL:igImageHookFile];


docController.delegate=self;


[docController presentOpenInMenuFromRect:CGRectMake(0 ,0 , 612, 612) inView:self.view animated:YES];

小开

I tried this in my application and it is working perfectly (Swift)

import Foundation


import UIKit


class InstagramManager: NSObject, UIDocumentInteractionControllerDelegate {


private let kInstagramURL = "instagram://"
private let kUTI = "com.instagram.exclusivegram"
private let kfileNameExtension = "instagram.igo"
private let kAlertViewTitle = "Error"
private let kAlertViewMessage = "Please install the Instagram application"


var documentInteractionController = UIDocumentInteractionController()


// singleton manager
class var sharedManager: InstagramManager {
struct Singleton {
static let instance = InstagramManager()
}
return Singleton.instance
}


func postImageToInstagramWithCaption(imageInstagram: UIImage, instagramCaption: String, view: UIView) {
// called to post image with caption to the instagram application


let instagramURL = NSURL(string: kInstagramURL)
if UIApplication.sharedApplication().canOpenURL(instagramURL!) {
let jpgPath = (NSTemporaryDirectory() as NSString).stringByAppendingPathComponent(kfileNameExtension)
UIImageJPEGRepresentation(imageInstagram, 1.0)!.writeToFile(jpgPath, atomically: true)
let rect = CGRectMake(0,0,612,612)
let fileURL = NSURL.fileURLWithPath(jpgPath)
documentInteractionController.URL = fileURL
documentInteractionController.delegate = self
documentInteractionController.UTI = kUTI


// adding caption for the image
documentInteractionController.annotation = ["InstagramCaption": instagramCaption]
documentInteractionController.presentOpenInMenuFromRect(rect, inView: view, animated: true)
}
else {


// alert displayed when the instagram application is not available in the device
UIAlertView(title: kAlertViewTitle, message: kAlertViewMessage, delegate:nil, cancelButtonTitle:"Ok").show()
}
}
}




func sendToInstagram(){


let image = postImage


InstagramManager.sharedManager.postImageToInstagramWithCaption(image!, instagramCaption: "\(description)", view: self.view)


}

小开

if you don't want to use UIDocumentInteractionController

import Photos


...


func postImageToInstagram(image: UIImage) {
UIImageWriteToSavedPhotosAlbum(image, self, #selector(SocialShare.image(_:didFinishSavingWithError:contextInfo:)), nil)
}
func image(image: UIImage, didFinishSavingWithError error: NSError?, contextInfo:UnsafePointer<Void>) {
if error != nil {
print(error)
}


let fetchOptions = PHFetchOptions()
fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
let fetchResult = PHAsset.fetchAssetsWithMediaType(.Image, options: fetchOptions)
if let lastAsset = fetchResult.firstObject as? PHAsset {
let localIdentifier = lastAsset.localIdentifier
let u = "instagram://library?LocalIdentifier=" + localIdentifier
let url = NSURL(string: u)!
if UIApplication.sharedApplication().canOpenURL(url) {
UIApplication.sharedApplication().openURL(NSURL(string: u)!)
} else {
let alertController = UIAlertController(title: "Error", message: "Instagram is not installed", preferredStyle: .Alert)
alertController.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
self.presentViewController(alertController, animated: true, completion: nil)
}


}
}

小开

I Used this code:

    NSString* filePathStr = [[NSBundle mainBundle] pathForResource:@"UMS_social_demo" ofType:@"png"];
NSURL* fileUrl = [NSURL fileURLWithPath:filePathStr];


NSString  *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/test.igo"];
[[NSData dataWithContentsOfURL:fileUrl] writeToFile:jpgPath atomically:YES];


NSURL* documentURL = [NSURL URLWithString:[NSString stringWithFormat:@"file://%@", jpgPath]];


UIDocumentInteractionController *interactionController = [UIDocumentInteractionController interactionControllerWithURL: documentURL];
self.interactionController = interactionController;
interactionController.delegate = self;
interactionController.UTI = @"com.instagram.photo";
CGRect rect = CGRectMake(0 ,0 , 0, 0);
[interactionController presentOpenInMenuFromRect:rect inView:self.view animated:YES];

小开

You can use one of the provided by Instagram url scheme

Instagram oficial doc here

Share with UIDocumentInteractionController

 final class InstagramPublisher : NSObject {


private var documentsController:UIDocumentInteractionController = UIDocumentInteractionController()


func postImage(image: UIImage, view: UIView, result:((Bool)->Void)? = nil) {
guard let instagramURL = NSURL(string: "instagram://app") else {
if let result = result {
result(false)
}
return
}
if UIApplication.sharedApplication().canOpenURL(instagramURL) {
let jpgPath = (NSTemporaryDirectory() as NSString).stringByAppendingPathComponent("instagrammFotoToShareName.igo")
if let image = UIImageJPEGRepresentation(image, 1.0) {
image.writeToFile(jpgPath, atomically: true)
let fileURL = NSURL.fileURLWithPath(jpgPath)
documentsController.URL = fileURL
documentsController.UTI = "com.instagram.exclusivegram"
documentsController.presentOpenInMenuFromRect(view.bounds, inView: view, animated: true)
if let result = result {
result(true)
}
} else if let result = result {
result(false)
}
} else {
if let result = result {
result(false)
}
}
}
}

Share with direct redirect

 import Photos


final class InstagramPublisher : NSObject {


func postImage(image: UIImage, result:((Bool)->Void)? = nil) {
guard let instagramURL = NSURL(string: "instagram://app") else {
if let result = result {
result(false)
}
return
}


let image = image.scaleImageWithAspectToWidth(640)


do {
try PHPhotoLibrary.sharedPhotoLibrary().performChangesAndWait {
let request = PHAssetChangeRequest.creationRequestForAssetFromImage(image)


let assetID = request.placeholderForCreatedAsset?.localIdentifier ?? ""
let shareURL = "instagram://library?LocalIdentifier=" + assetID


if UIApplication.sharedApplication().canOpenURL(instagramURL) {
if let urlForRedirect = NSURL(string: shareURL) {
UIApplication.sharedApplication().openURL(urlForRedirect)
}
}
}
} catch {
if let result = result {
result(false)
}
}
}
}

extension for resize photo to recommended size

 import UIKit


extension UIImage {
// MARK: - UIImage+Resize


func scaleImageWithAspectToWidth(toWidth:CGFloat) -> UIImage {
let oldWidth:CGFloat = size.width
let scaleFactor:CGFloat = toWidth / oldWidth


let newHeight = self.size.height * scaleFactor
let newWidth = oldWidth * scaleFactor;


UIGraphicsBeginImageContext(CGSizeMake(newWidth, newHeight))
drawInRect(CGRectMake(0, 0, newWidth, newHeight))
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage
}
}

Don't forget to add required scheme in plist

  <key>LSApplicationQueriesSchemes</key>
<array>
<string>instagram</string>
</array>

小开

You can do that without using the UIDocumentInteractionController and go straight to Instagram with these 3 methods:

It works just like all the other famous app does. The code is written in Objective c, so you can translate it to swift if you want. What you need to do is saving your image to the device and use a URLScheme

add this inside your .m file

#import <Photos/Photos.h>

First you need to save your UIImage to the device with this method:

-(void)savePostsPhotoBeforeSharing
{
UIImageWriteToSavedPhotosAlbum([UIImage imageNamed:@"image_file_name.jpg"], self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);
}

This method is the callback for saving the image to your device:

- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo: (void *) contextInfo;
{
[self sharePostOnInstagram];


}

After the image is saved to the device, you need to query the image you just saved and get it as a PHAsset

-(void)sharePostOnInstagram
{
PHFetchOptions *fetchOptions = [PHFetchOptions new];
fetchOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:NO],];
__block PHAsset *assetToShare;
PHFetchResult *result = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:fetchOptions];
[result enumerateObjectsUsingBlock:^(PHAsset *asset, NSUInteger idx, BOOL *stop) {
assetToShare = asset;




}];




if([assetToShare isKindOfClass:[PHAsset class]])
{
NSString *localIdentifier = assetToShare.localIdentifier;
NSString *urlString = [NSString stringWithFormat:@"instagram://library?LocalIdentifier=%@",localIdentifier];
NSURL *instagramURL = [NSURL URLWithString:urlString];
if ([[UIApplication sharedApplication] canOpenURL: instagramURL])
{
[[UIApplication sharedApplication] openURL: instagramURL];
} else
{
// can not share with whats app
NSLog(@"No instagram installed");
}


}
}

And dont forget to put this in your info.plist under LSApplicationQueriesSchemes

<string>instagram</string>

小开

-(void)shareOnInstagram {


CGRect rect = CGRectMake(self.view.frame.size.width*0.375 ,self.view.frame.size.height/2 , 0, 0);






NSString * saveImagePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/ShareInstragramImage.igo"];


[UIImagePNGRepresentation(_image) writeToFile:saveImagePath atomically:YES];


NSURL *igImageHookFile = [[NSURL alloc] initWithString:[[NSString alloc] initWithFormat:@"file://%@", saveImagePath]];


self.documentController=[UIDocumentInteractionController interactionControllerWithURL:igImageHookFile];


self.documentController.UTI = @"com.instagram.exclusivegram";
self.documentController = [self setupControllerWithURL:igImageHookFile usingDelegate:self];


[self.documentController presentOpenInMenuFromRect: rect    inView: self.view animated: YES ];


}


-(UIDocumentInteractionController *) setupControllerWithURL: (NSURL*) fileURL usingDelegate: (id <UIDocumentInteractionControllerDelegate>) interactionDelegate {


UIDocumentInteractionController *interactionController = [UIDocumentInteractionController interactionControllerWithURL: fileURL];
interactionController.delegate = interactionDelegate;
return interactionController;
}

小开

I noticed if you put URL pointing to image to activityItems instead of UIImage, Copy to Instagram activity item appears itself, and you don't have to do anything else. Please note that String objects inside activityItems would be discarded and there is no way to prefill caption in Instagram. If you still want to hint user to post particular caption, you'd need to create custom activity where you copy that text to clipboard and let user know about it, like in this gist.

小开

    @import Photos;


-(void)shareOnInstagram:(UIImage*)imageInstagram {


[self authorizePHAssest:imageInstagram];
}


-(void)authorizePHAssest:(UIImage *)aImage{


PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];


if (status == PHAuthorizationStatusAuthorized) {
// Access has been granted.
[self savePostsPhotoBeforeSharing:aImage];
}


else if (status == PHAuthorizationStatusDenied) {
// Access has been denied.
}


else if (status == PHAuthorizationStatusNotDetermined) {


// Access has not been determined.
[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {


if (status == PHAuthorizationStatusAuthorized) {
// Access has been granted.
[self savePostsPhotoBeforeSharing:aImage];
}
}];
}


else if (status == PHAuthorizationStatusRestricted) {
// Restricted access - normally won't happen.
}
}
-(void)saveImageInDeviceBeforeSharing:(UIImage *)aImage
{
UIImageWriteToSavedPhotosAlbum(aImage, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);
}


- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo: (void *) contextInfo;
{
if (error == nil){
[self sharePostOnInstagram];
}
}


-(void)shareImageOnInstagram
{
PHFetchOptions *fetchOptions = [PHFetchOptions new];
fetchOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:false]];
PHFetchResult *result = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:fetchOptions];


__block PHAsset *assetToShare = [result firstObject];


if([assetToShare isKindOfClass:[PHAsset class]])
{
NSString *localIdentifier = assetToShare.localIdentifier;
NSString *urlString = [NSString stringWithFormat:@"instagram://library?LocalIdentifier=%@",localIdentifier];
NSURL *instagramURL = [NSURL URLWithString:urlString];
if ([[UIApplication sharedApplication] canOpenURL: instagramURL])
{
[[UIApplication sharedApplication] openURL:instagramURL options:@{} completionHandler:nil];
} else
{
NSLog(@"No instagram installed");
}
}
}

NOTE:- IMP TODO:- Add below key in Info.plist

<key>LSApplicationQueriesSchemes</key>
<array>
<string>instagram</string>
</array>

小开

NSURL *myURL = [NSURL URLWithString:sampleImageURL];
NSData * imageData = [[NSData alloc] initWithContentsOfURL:myURL];
UIImage *imageToUse = [[UIImage alloc] initWithData:imageData];
NSString *documentDirectory=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
NSString *saveImagePath=[documentDirectory stringByAppendingPathComponent:@"Image.ig"];
[imageData writeToFile:saveImagePath atomically:YES];
NSURL *imageURL=[NSURL fileURLWithPath:saveImagePath];
self.documentController = [UIDocumentInteractionController interactionControllerWithURL:imageURL];
self.documentController.delegate = self;
self.documentController.annotation = [NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@""], @"", nil];
self.documentController.UTI = @"com.instagram.exclusivegram";
[self.documentController presentOpenInMenuFromRect:CGRectMake(1, 1, 1, 1) inView:self.view animated:YES];